Electric-stove insulating support



May 5i, 1925.

1,537,019 R. H. MaclNNl-:s

ELECTRIC STOVE INSULTING SUPPORT Filed Aug. 1s, 1924 gn/camice ,6055erMc/MM5 Patented May 5, 1925.

UNITEDv STATES PATENT OFFICE.

ROBERT H. MACNNES, OF HAMILTON, ONTARIO, CANADA, ASSIGNOR TO D. MOORECOMPANY, LIMITED, OF HAMILTON, CANADA.

ELECTRIC-STOVE INSULATING SUPPORT.

Application led August 1.8, 1924.

To all 'whom 'it' may concern.-

Be it known that ROBERT H. Maolzvnns, a subject of the King of GreatBritain, residing at Hamilton, in the county ot Tentworth, and Provinceof Ontario, Canada, has invented certain new and useful Improvements inan Electric-Stove Insulating Support, of which the following is aspecihcation.

This invention relates to elect-ric stoves, hot plates7 and otherelectric heating appliances.

This invention especially has reference to an insulating support orcarrier bar for electric heater resistance coils and to an insulatingconnecting element for such bars.

In the construction of electric heating devices it is common tov providea series ot bars for supporting the helically coiled re'- sistance wire.In some instances, as in the heating element used on top ot stoves, thearrangement is such that these supporting bars extend radially from acommon center. In other instances, as in grilles, heating elements forovens and the like these supporting bars are placed side by side inparallel relation.

Usually special bars are used tore-ach purpose and these bars are not,in many cases, interchangeable so that the same bar cannot be used inthe oven of an electric stove as is used for the so called top burners.

One important object of the present invention is to provide an improvedtorni kof insulating bar which is adapted for use interchangeably ineither the oven or the Atop portion of a stove, can be assembled torgrilles, and in tact, is capable ot acting as a unit in the constructionof any different type ot device wherein resistance coils are used.

It is also common in electric stoves and other like devices to carry theheat coils either spirally in a circular heating element or transverselyto the supporting` bars troni one side to the other of a rectangularheating element.

A second important object ot the presentinvention is to provide asupporting bar wherein the bar is so arranged to provide a bar withcoiled resistant Wire in an alternately curved arrangement, each barcarrying its own unit of resistance coils.

The modern stove or other like devices is commonly arranged for threedegrees ot heat, low, medium and high. To this end Serial No. 732,748.

the resistance ot' the heating element is tapped oli' at its ends and atal point intermediate its ends.

A third important object of the invention is to provide a specialinsulating sleeve for use in connection with the improved bar i Yin theaccompanying drawings and specilically claimed.

In the accompanying drawings like characters ot reference indicate likeparts in the several views, and:

Figure 1 is a side elevation of the improved insulating bar and showingthe improved tube or conduit, the device being illustrated in the mannerin which it is applied to a stove having metallic top.

Figure 2 is a top plan view of one ot the bars as shown in Figure 1.

Figure 3 is a section on the line 3 3 ot Figure 1.

Figure 4t is a section on the line 1 4 of Figure 1..

Fach unit bar, as constructed in accord- -ance with the presentinvention is provided with ay base 10 having laterally extending flanges11 and running longitudinally of the upper part on the base is a rib orweb 1") -provided with a series oit openings 13 between which, on eachside of the web are vertically disposed lugs, or bosses lil, thesebosses and openings alternating and there being one more boss thanopening as clearly shown in the ligures ot the drawings. The stove topis indicated at 15 and a bottom 16 is connected thereto by means otposts 1T and cotter pins 1S.

In this bottoni portion is a pair ot plates 19 and 2O which are heldapart at the middle, the plate 19 being bent downward at its peripheryto rest on the plate 20. The plate 19 is provided with a suitableopening L1 for each oit' the insulating bars, the opening being otproper size to take in the base 10 with the tianges 11 projectingbetween the two plates 1i) and 2t) so that the bars are held in proper(ixed position. At one end CIJ llU

LioV

Vrial spirit thereof.

the-flanges 11 terminate short of the end of the base lO so as to leavea rabbetted portion 22Vat'this end and in this rabbetted portion litsthe base 23 of a T-shaped conduit ineinber having a downwardly extendingste-rn 24 provided with a vertically disposed pair of openings 25between which, at its lower end, is a binding post or screw 26. Theseopenings 25, when the conduit is in position, register with similaropenings 27 forined in the base l at one end thereof. VThe resistancewire is indicated at 28 and, as is ordinarily the case, this wire isprefer-ably wound in convolutions and is led alternately from one sideto the other through the openings 13, one end of the wire being broughtdown through one of the Vopenings 27 and the corresponding opening andconnected to the bin-ding post 26. The other end of the wir may, vifdesired, be carried over to a second insulating bar and connected to theresistance of that bar or may be brought back and vled down through theother openings 27 and 25. Y Y i In this manner any nuinber of these sup-Y porting Vbars inay be. used in any desired arrangement. They inay beplaced radially about 4a co'innroncenter and niay be extender 'as' faras desired by the use of twoor more bars in alineinent. Similarly, anydesired -extent of Vrectangular arrangement may be made by arranging thebars e-nd vto end in such number as desired and then using as ,1n-anyrows or lines as is necessary to pro-perly cover the surface ofthe4heater or stove. T-heiiehas thus been provided a simple and efficientdevice of the `kind described and for the purpose specified. Y Y

It is Obvious that ininor changes inay be naa-dein the form andconstruction of the invention without departing frein the inatey lt isnot, therefore, desired to confine the invention to the exact forinherein shown anddescribed, but it is desired to: include all snch asproperly come within the scope claimed.

Having thus described the invention, what is claimed as new, is:

anemie Y Y l. A supporting bar for electric heating devices forined ofrefractory insulating inaterial and having a base and a web extendinglongitudinally of the base, said web being-provided on its sides withspaced lugs, and having openings for resistance coils between saidlugs.`

2. A supporting bar for electric heating devices fornied of refractoryinsulating ina-Y the side edges of the base, said base being rabbet-tedat one end and provided with a conductor Vopening extendingtherethrough,

and a l'shaped conduit having a base portion fitting the rabbettedportion of the base of the bar and provided with openings registeringwith the openings in the base of the bar.

4L. A supporting bar for electric heating devices forined of refractoryinsulating niaterial and having a base and a web extendinglongitudinally of the base, said web being provided on its sides withspaced lugs,

having openings for resistance coils between Y said lugs; incoinbination with a'spirally wound resistance wire forming a helix, saidhelix being led through the openings in the web and having the portionsbetween said openings resting against the lugs between the respectiveopenings. p

ln testiiinony whereof l have aflixed iny signature. Y

Bonner n. inCrNNns. Witnesses H. G. HENDRY, V. D. EARLE.

